matrix.org/content/blog/2023/07/2023-07-07-make-sure-libera-bridge-keeps-working.md

+++ date = "2023-07-07T18:45:00Z" title = "Making Sure The Libera.Chat Bridge Keeps Working"

[taxonomies] author = ["Thib"] category = ["Bridges"] +++

Libera Chat recently announced their decision to opt-out of portalled rooms from the Libera.Chat bridge instance hosted by the Matrix.org Foundation (a decision we regret but respect). This means that for the bridge to keep working, all of your portalled rooms need to be turned into plumbed rooms before July 31st. All of this might be a bit obscure, so let’s walk together through these concepts and give you the tools to make sure the bridge keeps working for you.

Am I concerned?

If your community is primarily on Matrix and your rooms are not bridged to Libera.Chat channels, then you’re not concerned!

If your community is spread across Matrix and Libera Chat, you need to make sure your room is “plumbed” into a Libera Chat channel, and not “portalled” to it. But what are those, and how to find out?

Plumbed and portalled?

The simplest approach to it is to say that:

• Portalled rooms are primarily owned by the bridge and “obey” the IRC side. Everyone can join a portalled room.
• Plumbed rooms are primarily owned by an individual, and try to obey the IRC side as much as possible. Plumbed rooms require an IRC chanop to approve a plumbing request to establish the link between the Matrix room and the IRC channel.

If you created the room yourself and you remember manually plumbing it into IRC, then it's a plumbed room. In all other cases, chances are very high that you are using a portalled room. There is no simple way for the general public to know whether the room is plumbed or portalled because it’s a technicality that shouldn’t matter for most people, and the bridge was not designed to work with only plumbed rooms.

Widgets are not part of the Matrix specification, but given the short time you have to migrate your channels, they’re the most straightforward way to figure out whether your room is portalled or plumbed and do the necessary to keep the bridge working.

In this guide, we’ll be using Element. Open your room, then click on the top right i to open the right panel. Click on “Add widgets bridges & bots”.

Click on “IRC Bridge (Libera.Chat)” and see if you have results in the “Linked channels” section.

If you see results in that section, the room is plumbed, and it will keep working. If you don’t see any result in that section, the room is portalled and the bridge will stop working by July 31st.

What to do if my room is portalled

Unfortunately, portalled rooms cannot be easily turned into plumbed rooms. You need to:

1. Create a brand new Matrix room
2. Plumb it to the IRC channel it was bridged to
3. Redirect the users of the portalled room to the new plumbed room.

The third step can will be done automatically by the bridge in portalled rooms. On July 31st, it will make the room read only and list the public rooms which are plumbed to the same IRC channel.

Create a brand new room

At first this room is not connected to IRC at all. We recommend you to set the room history visibility to “Members only (since they joined)”, which corresponds to m.room.history_visibility = joined technically. This setting matches IRC’s behaviour.

Plumb it to IRC

In Element, make sure you’re in the room you have just created, and click on the top right i icon to open the right panel. Then at the bottom click on “Add widgets, bridges & bots” like you did in the portalled room.

In the “Bridges” section, click on “IRC Bridge (Libera.chat)” and “Add”. Scroll down to “Link a new channel”. You will be asked to fill information so you can plumb the room to IRC. You can’t edit the server field, which is correctly set to Libera Chat. Enter the channel you want to plumb to, and the nick of a chanop of this channel.

We ask you to please be considerate of Libera Chat chanops and staff, and to only send plumb requests to channels:

• you control;
• or you have talked to the chanop prior to the plumb request

The chanop will receive this request on their end:

If they accept, the room will be plumbed into the IRC channel. Again, please be mindful of the remote side of the bridge and don’t send plumbing requests out of the blue: IRC chanops will very likely turn them down if they don’t know who is sending them or who is controlling the room.

A note on aliases

Portalled rooms used to have room addresses in the form#myroom:libera.chat. Since the libera.chat instance only has Matrix ghosts and no real human users, you can’t move the alias from the portalled room to your new plumbed room. This is by design.

We hope to be able to turn portalling back on in the future, when we have more resources reserved for the bridge and can make stronger commitments. As such we want to keep addresses ending in :libera.chat for portalled rooms.

This is not too much of a problem for your room and users though. Let’s consider your portalled room was #myroom:libera.chat, and that you have created #myroom:example.com to plumb it into the same #myroom channel on Libera.Chat. People who try to join #myroom:libera.chat will be greeted with a message telling them that the room has been archived, and redirect them to your plumbed room.